I noted the problem when opening a *.txt file.
STFW Xfce stores file associations for a given user in:
~/.config/mimeapps.list
Mine contained two entries that seem to be the source of the bug:
2015-12-13 13:23:42 dpchrist@i72600s ~/.config
$ egrep -i '^\[|devede' mimeapps.list-20151212-225710-devede
[Default Applications]
text/plain=devede.desktop
[Added Associations]
text/plain=devede.desktop;
Removing them fixed the problem for *.txt files -- double-clicking on a
*.txt file in Thunar opens the file in Mousepad.
But when I double-click on a *.devede file, it is also opened by Mousepad!
So, it appears that:
1. Xfce thinks *.txt files are MIME type text/plain.
2. Xfce thinks *.devede files are MIME type text/plain.
3. Xfce uses MIME type for file association.
So, the root cause of the problem appears to be Xfce and the design of
its file association feature (?).
David
